Multiple-expansion engine.



J. H. SEBALD.

MULTIPLE EXPANSION ENGINE,

APPLICATION FILED AUG.4, 1909.

1,124,339, Patented Jan. 12, 1915.

THE IlORRlS PETERS COA PHDTOLIIIHOU WASHINGTON. By C.

UNTTED STATE PATENT QFETQE,

JOSEPH H. SEBALD, 0E ARLINGTON, NEW JERSEY, ASSIGNOR TO HENRY R.WORTHING- lON, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

MULTIPLE-EXPANSION ENGINE.

Application filed August 4, 1909.

To all whom it may concern:

Be it known that I, Josnrrr H. SEBALD, a citizen of the United States,residing at Arlington, county of Essex, and State of New Jersey, haveinvented certain new and useful Improvements in Multiple-ExpansionEngines, fully described and represented 1n the following specificationand the accompanying drawings, forming a part of the same.

This invention relates especially to vertical triple expansion duplexpump engines of that class having the cylinders on each side arranged inline, the especial object of the invention being to provide an improvedarrangement of pistons, piston rods, and cross head for vertical enginesof this class. The invention includes, however, certain broad featureswhich may be applied also in single engines or in horizontal engines.

In the accompanying drawing forming a part of this specification, thereis shown for the purpose of illustration a vertical duplex pumpingengine embodying all the features of the invention in a preferred formand this construction will now be described in detail and the featuresforming the invention specifically pointed out in the claims. Referringto the drawing, which shows the pumping engine with one side inelevation and the other side partly in section taken centrally throughthe steam and pump ends, A, B, C are respectively the high pressure,intermediate pressure, and low pressure cylinders having thecorresponding pistons o Z), c, and D the water cylinders on each side ofthe engine having the plungers (Z. The low pressure pistons c areconnected to plungers (Z by rods 14:, heads 15 and side rods 16, liquidbalancing cylinder E and balancing piston 0 being shown, although itwill be understood that these features are not essential to the presentinvention.

Any suitable construction may be used for controlling the admission andexhaust of steam, employing either separate out off valves or combinedadmission and cut ofi' valves, and cut off valves may or may not be usedon the intermediate cylinders as preferred. In the construction shown,cut off valves are used only on the high pressure cylinder and separateout off valves are employed, the construction and operating connectionsof the valves indicated being the same as that of United States LettersSpecification of Letters Patent.

Patented Jan, 12, 1915.

Serial No. 511,143.

Patent to Brown No. 7%,667, dated December 15, 1903, the valve cranksbeing connected by links 10 so as to be operated from cross over rockshafts 11 which are preferably arranged between the high andintermediate pressure cylinders, all as in said Letters Patent No.746,667.

Referring now to the arrangement of the steam end, the low pressurepiston c on each side is connected by side rods 17 to cross head 18 towhich the high pressure piston a is connected by rod 19. This cross headis preferably placed, as shown, between the high pressure andintermediate pressure cylinders A, B, which are separated sufficientlyfor the movement of the cross head, and the high pressure piston rod 19passes through the inner or lower end of the high pressure cylinder A.Intermediate pressure piston 7) is connected by rod 20 passing throughthe inner or lower end of the cylinder B to the low pressure piston c.The side rods 17 thus carry only the power of the high pressure piston,and each of the piston rods thus transmits only the power of a singlecylinder, the power of the three cylinders being transmitted from thelow pressure piston c to the plunger through heavy rod 14. The lowpressure piston c is accessible and removable through lower or innerhead 1, the intermediate piston 6 through upper or outer head 2, whichmay be a separate head or a part of the cradle carrying the highpressure cylinder, and the high pressure piston a through upper or outerhead 3. The'cross heads 18 actuate the cross over rock shafts 11 througharms 4 on the cross heads and the usual levers 5 on the rock shaft.

It will be seen that, in the construction shown, each of the pistons isreadily accessible and removable, convenient means are provided foractuating the valve motion, the number of stuffing boxes is reduced tothe minimum, and light piston rods may be used throughout the steam end,as there is only the load of one piston on any rod, excentthe plungerrod 14 through which the engine power is transmitted, and the outsiderods to the cross heads carry only the high pressure piston load. Theinvention provides a very convenient, compact and efficient constructionof duplex engine in which the valve movement is operated Without anyextra rod from the low pressure piston, or

other extra parts, but directly from the cross head through which thepower of the high pressure piston is transmitted.

It is to be understood that the invention is not to be limited to theexact construction or arrangement of parts shown, but that modificationsmay be made within the invention, as defined by the claims, and that thebroader features of theinvention may be applied to engines having morethan three cylinders.

What I claim is 1. A multiple expansion engine having three cylindersarranged in line in the order of expansion with the low pressurecylinder placed inside and the power applied from the low pressurepiston, a rod connecting the intermediate pressure piston and lowpressure piston, a cross head to which the high pressure piston isconnected by a rod passing through one head of the high pressurecylinder, and side rods connecting the cross head with the low pressurepiston.

2. A multiple expansion engine having three cylinders arranged in linein the order of expansion with the low pressure cylinder placed in sideand the power applied from the low pressure piston, a rod connecting theintermediate pressure piston and low pressure piston, a cross headbetween the high pressure cylinder and intermediate pressure cylinder towhich the high pressure piston is connected by a rod passing through theinner head of the high pressure cylinder, and side rods connecting thecross head with the low pressure piston.

3. In a multiple expansion duplex engine, the combination of threecylinders on each side arranged in line in the order of expansion withthe low pressure cylinder placed inside and the power applied from thelow pressure piston, rods connecting the intermediate pressure pistonsand low pressure pistons, cross heads to which the high pressure pistonsare connected by rods passing through one head of the high pressurecylinders, side rods connecting the cross heads with the loW pressurepistons, rock shafts extending across the engine and connected to thevalves for operating the valves on each side of the engine from theother side, and operating connections between the cross heads and rockshafts.

I. In a multiple expansion duplex engine, the combination of threecylinders on each side arranged in line in the order of expansion withthe low pressure cylinder placed inside and the power applied from thelow pressure piston, rods connecting the intermediate pressure pistonsand low pressure pistons, cross heads between the high pressurecylinders and intermediate pressure cylinders to which the high pressurepistons are connected by rods passing through the inner heads of thehigh pressure cylinders, side rods connecting the cross heads with thelow pressure pistons, rock shafts extending across the engine betweenthe high pressure cylinders and intermediate pressure cylinders foroperating the valves on each side of the engine from the other side, andoperating connections between the cross heads and rock shafts.

In testimony whereof, I have hereunto set my hand, in the presence oftwo subscribing witnesses.

J O$EPH I-I. SEBALD. Witnesses:

CARL GEORGE DE LAVAL, JOHN D. BIRD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent:

Washington, D. G.

